Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane

Autores
Brorby, M.; Kaaret, P.; Prestwich, A.; Mirabel Miquele, Igor Felix
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The source of energetic photons that heated and reionized the early Universe emains uncertain. Early galaxies had low metallicity and recent population synthesis calculations suggest that the number and luminosity of high-mass X-ray binaries are enhanced in star-forming galaxies with low metallicity, offering a potentially important and previously overlooked source of heating and reionization. Lyman break analogue (LBA) galaxies are local galaxies that strongly resemble the high-redshift, star-forming Lyman break galaxies and have been suggested as local analogues to these metal-deficient galaxies found in the early Universe. We studied a sample of 10 LBAs in order to measure the relation between star formation rate and Xray luminosity. We found that for LBAs with metallicities in the range 12 + log10(O/H) =8.15–8.80, the LX −SFR relation was log10(LX/SFR [erg s−1 M−1 yr]) = 39.85(±0.10) in the 0.5–8 keV band with a dispersion of σ = 0.25 dex. This is an enhancement of nearly a factor of 2 in the L0.5−8 keV–SFR relation relative to results for nearby, near-solar metallicity galaxies. The enhancement is significant at the 98.2 per cent level (2.4σ). Our enhanced LX/SFR relation is consistent with the metallicity-dependent predicted value from population synthesis models. We discuss the possibility of an LX–SFR–metallicity plane for star-forming galaxies. These results are important to our understanding of reionization and the formation of early galaxies.
Fil: Brorby, M.. University of Iowa; Estados Unidos
Fil: Kaaret, P.. University of Iowa; Estados Unidos
Fil: Prestwich, A.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Mirabel Miquele, Igor Felix. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. CEA-Saclay; Francia
Materia
Rayos X
Metalicidad
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/18297
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/18297
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity planeBrorby, M.Kaaret, P.Prestwich, A.Mirabel Miquele, Igor FelixRayos XMetalicidadhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The source of energetic photons that heated and reionized the early Universe emains uncertain. Early galaxies had low metallicity and recent population synthesis calculations suggest that the number and luminosity of high-mass X-ray binaries are enhanced in star-forming galaxies with low metallicity, offering a potentially important and previously overlooked source of heating and reionization. Lyman break analogue (LBA) galaxies are local galaxies that strongly resemble the high-redshift, star-forming Lyman break galaxies and have been suggested as local analogues to these metal-deficient galaxies found in the early Universe. We studied a sample of 10 LBAs in order to measure the relation between star formation rate and Xray luminosity. We found that for LBAs with metallicities in the range 12 + log10(O/H) =8.15–8.80, the LX −SFR relation was log10(LX/SFR [erg s−1 M−1 yr]) = 39.85(±0.10) in the 0.5–8 keV band with a dispersion of σ = 0.25 dex. This is an enhancement of nearly a factor of 2 in the L0.5−8 keV–SFR relation relative to results for nearby, near-solar metallicity galaxies. The enhancement is significant at the 98.2 per cent level (2.4σ). Our enhanced LX/SFR relation is consistent with the metallicity-dependent predicted value from population synthesis models. We discuss the possibility of an LX–SFR–metallicity plane for star-forming galaxies. These results are important to our understanding of reionization and the formation of early galaxies.Fil: Brorby, M.. University of Iowa; Estados UnidosFil: Kaaret, P.. University of Iowa; Estados UnidosFil: Prestwich, A.. Harvard-Smithsonian Center for Astrophysics; Estados UnidosFil: Mirabel Miquele, Igor Felix. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. CEA-Saclay; FranciaWiley Blackwell Publishing, Inc2016-02-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/18297Brorby, M.; Kaaret, P.; Prestwich, A.; Mirabel Miquele, Igor Felix; Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane; Wiley Blackwell Publishing, Inc; Monthly Notices Of The Royal Astronomical Society; 457; 4; 5-2-2016; 4081-40880035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/doi:10.1093/mnras/stw284info:eu-repo/semantics/altIdentifier/ark/https://academic.oup.com/mnras/article-abstract/457/4/4081/2589088/Enhanced-X-ray-emission-from-Lyman-break-analogues?redirectedFrom=fulltextinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:59:04Zoai:ri.conicet.gov.ar:11336/18297instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:59:05.046CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane
title Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane
spellingShingle Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane
Brorby, M.
Rayos X
Metalicidad
title_short Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane
title_full Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane
title_fullStr Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane
title_full_unstemmed Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane
title_sort Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane
dc.creator.none.fl_str_mv Brorby, M.
Kaaret, P.
Prestwich, A.
Mirabel Miquele, Igor Felix
author Brorby, M.
author_facet Brorby, M.
Kaaret, P.
Prestwich, A.
Mirabel Miquele, Igor Felix
author_role author
author2 Kaaret, P.
Prestwich, A.
Mirabel Miquele, Igor Felix
author2_role author
author
author
dc.subject.none.fl_str_mv Rayos X
Metalicidad
topic Rayos X
Metalicidad
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The source of energetic photons that heated and reionized the early Universe emains uncertain. Early galaxies had low metallicity and recent population synthesis calculations suggest that the number and luminosity of high-mass X-ray binaries are enhanced in star-forming galaxies with low metallicity, offering a potentially important and previously overlooked source of heating and reionization. Lyman break analogue (LBA) galaxies are local galaxies that strongly resemble the high-redshift, star-forming Lyman break galaxies and have been suggested as local analogues to these metal-deficient galaxies found in the early Universe. We studied a sample of 10 LBAs in order to measure the relation between star formation rate and Xray luminosity. We found that for LBAs with metallicities in the range 12 + log10(O/H) =8.15–8.80, the LX −SFR relation was log10(LX/SFR [erg s−1 M−1 yr]) = 39.85(±0.10) in the 0.5–8 keV band with a dispersion of σ = 0.25 dex. This is an enhancement of nearly a factor of 2 in the L0.5−8 keV–SFR relation relative to results for nearby, near-solar metallicity galaxies. The enhancement is significant at the 98.2 per cent level (2.4σ). Our enhanced LX/SFR relation is consistent with the metallicity-dependent predicted value from population synthesis models. We discuss the possibility of an LX–SFR–metallicity plane for star-forming galaxies. These results are important to our understanding of reionization and the formation of early galaxies.
Fil: Brorby, M.. University of Iowa; Estados Unidos
Fil: Kaaret, P.. University of Iowa; Estados Unidos
Fil: Prestwich, A.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Mirabel Miquele, Igor Felix. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. CEA-Saclay; Francia
description The source of energetic photons that heated and reionized the early Universe emains uncertain. Early galaxies had low metallicity and recent population synthesis calculations suggest that the number and luminosity of high-mass X-ray binaries are enhanced in star-forming galaxies with low metallicity, offering a potentially important and previously overlooked source of heating and reionization. Lyman break analogue (LBA) galaxies are local galaxies that strongly resemble the high-redshift, star-forming Lyman break galaxies and have been suggested as local analogues to these metal-deficient galaxies found in the early Universe. We studied a sample of 10 LBAs in order to measure the relation between star formation rate and Xray luminosity. We found that for LBAs with metallicities in the range 12 + log10(O/H) =8.15–8.80, the LX −SFR relation was log10(LX/SFR [erg s−1 M−1 yr]) = 39.85(±0.10) in the 0.5–8 keV band with a dispersion of σ = 0.25 dex. This is an enhancement of nearly a factor of 2 in the L0.5−8 keV–SFR relation relative to results for nearby, near-solar metallicity galaxies. The enhancement is significant at the 98.2 per cent level (2.4σ). Our enhanced LX/SFR relation is consistent with the metallicity-dependent predicted value from population synthesis models. We discuss the possibility of an LX–SFR–metallicity plane for star-forming galaxies. These results are important to our understanding of reionization and the formation of early galaxies.
publishDate 2016
dc.date.none.fl_str_mv 2016-02-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/18297
Brorby, M.; Kaaret, P.; Prestwich, A.; Mirabel Miquele, Igor Felix; Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane; Wiley Blackwell Publishing, Inc; Monthly Notices Of The Royal Astronomical Society; 457; 4; 5-2-2016; 4081-4088
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/18297
identifier_str_mv Brorby, M.; Kaaret, P.; Prestwich, A.; Mirabel Miquele, Igor Felix; Enhanced X-ray emission from Lyman break analogues and a possible LX-SFR-metallicity plane; Wiley Blackwell Publishing, Inc; Monthly Notices Of The Royal Astronomical Society; 457; 4; 5-2-2016; 4081-4088
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/doi:10.1093/mnras/stw284
info:eu-repo/semantics/altIdentifier/ark/https://academic.oup.com/mnras/article-abstract/457/4/4081/2589088/Enhanced-X-ray-emission-from-Lyman-break-analogues?redirectedFrom=fulltext
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.221938

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